曼哈顿政策研究所-高利率如何将华盛顿推向联邦债务危机（英）-2021.12-32页_2mb

Summary: How Higher Interest Rates Could Push Washington Toward a Federal Debt Crisis

Core Content

This report by Brian Riedl from the Manhattan Institute warns that the current trajectory of U.S. federal debt, combined with the potential for rising interest rates, could lead to a fiscal crisis. It highlights the growing national debt, the questionable assumptions behind its affordability, and the risks posed by a return to higher interest rates.

Main Points

1. Current Debt Trends

• The U.S. national debt is projected to grow significantly, even without new spending or tax-cut legislation.
• By 2033, the debt-to-GDP ratio is expected to exceed 100%, and with additional spending proposals, it could surpass 250% in three decades.
• The debt will continue to grow, reaching $44 trillion in a decade and $112 trillion in 30 years of baseline deficits, driven by Social Security and Medicare shortfalls.

2. Assumptions Undermining Fiscal Stability

• The argument that current debt levels are manageable is based on two flawed assumptions:
  • That 100% debt-to-GDP is not harmful, despite projections of 200% and 250%.
  • That low interest rates will persist indefinitely, which is not supported by historical data or economic trends.

3. Interest Rate Dynamics

• Interest rates are influenced by real rates of return, inflation expectations, and market confidence.
• The post-1990 decline in interest rates was driven by several factors:
  • Demographics: Baby boomers increased savings, while younger populations grew slower.
  • Declining Productivity: Reduced economic growth and innovation slowed interest rate increases.
  • Global Savings Glut: Surplus savings from Asia and oil-exporting nations lowered rates.
  • Flight to Safety: Investors preferred U.S. Treasury bonds during global market instability.
  • Federal Reserve Policy: Low inflation targets and quantitative easing suppressed rates.
  • Private-Sector Deleveraging: Post-2008 financial crisis, households and businesses reduced debt.

4. Risks of Rising Interest Rates

• If interest rates rise to 4%-5%, the cost of servicing the national debt could surge.
• A 3 percentage-point increase in interest rates could significantly increase federal budget deficits and interest costs.
• The report questions whether offsetting factors (like productivity and demographics) can sustain the current low-rate environment, noting that many of these factors are transitory or structural and may not continue to suppress rates indefinitely.

5. Who Will Finance the Debt?

• China and Japan have historically financed a small portion of U.S. debt (about 1%).
• The Federal Reserve has played a major role in financing recent deficits, but it is unlikely to continue doing so at the same scale.
• The U.S. will need to finance the debt domestically, which may require higher interest rates to attract investors.

Key Findings

• The U.S. government is on track for the largest debt binge in history, with debt-to-GDP ratios projected to reach 200% or more.
• Interest rates have fallen significantly since 1990, but this trend is unlikely to continue.
• Economic forecasters have a poor track record, and past failures to predict interest rate movements should cast doubt on current confidence.
• Modern Monetary Theory is not a reliable solution, as it assumes the Fed can indefinitely finance deficits without triggering inflation.

Conclusion

The report calls for fiscal reforms to reduce baseline deficits and mitigate the risk of a future debt crisis. It emphasizes that policymakers, economists, and the public must acknowledge the uncertainty of economic forecasts and the long-term risks of unchecked government borrowing. The U.S. must prepare for the eventual return to higher interest rates, which could make the current debt levels unaffordable and unmanageable.

Key Quotes

• "The debt-to-GDP ratio is projected to reach levels that even debt doves would likely consider unsustainable."
• "Interest rates have never [been accurately] forecast."
• "The U.S. government is in the early stages of what is projected to be the largest government debt binge in world history."

References

• CBO projections and historical data on interest rates.
• Analyses by economists like Thomas Laubach, Eric Engen, Glenn Hubbard, and Ernie Tedeschi.
• Historical examples of failed economic predictions, such as the Great Depression, dotcom bubble, and Lehman Brothers collapse.

Recommendations

• Lawmakers should enact reforms to reduce long-term debt projections.
• Policymakers must be cautious and not assume that current economic trends will persist indefinitely.
• Economists and financial analysts should avoid overconfidence in their forecasts and acknowledge the inherent uncertainty in macroeconomic variables.

Final Note

The report underscores the importance of fiscal responsibility and the need for humility in economic forecasting, urging a return to prudent financial management to avoid a potential federal debt crisis.